-3x+3(4x-5)=21

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Solution for -3x+3(4x-5)=21 equation:


Simplifying
-3x + 3(4x + -5) = 21

Reorder the terms:
-3x + 3(-5 + 4x) = 21
-3x + (-5 * 3 + 4x * 3) = 21
-3x + (-15 + 12x) = 21

Reorder the terms:
-15 + -3x + 12x = 21

Combine like terms: -3x + 12x = 9x
-15 + 9x = 21

Solving
-15 + 9x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '15' to each side of the equation.
-15 + 15 + 9x = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 9x = 21 + 15
9x = 21 + 15

Combine like terms: 21 + 15 = 36
9x = 36

Divide each side by '9'.
x = 4

Simplifying
x = 4

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